/**
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { KHIFileTextReference } from '../schema/khi-file-types';
import { ReferenceType, TextReference } from './interface';

export interface TextReferenceFromKHIFileBinary extends TextReference {
  type: ReferenceType.KHIFileBinary;
  buffer: number;
  offset: number;
  len: number;
}

/**
 * Convert the raw KHIFileTextReference to TextReferenceFromKHIFileBinary.
 */
export function ToTextReferenceFromKHIFileBinary(
  reference: KHIFileTextReference | null,
): TextReference {
  if (reference === null) {
    return {
      type: ReferenceType.NullReference,
    };
  }
  return {
    type: ReferenceType.KHIFileBinary,
    buffer: reference.buffer,
    offset: reference.offset,
    len: reference.len,
  } as TextReferenceFromKHIFileBinary;
}

/**
 * Check if the given TextReference is for TextReferenceFromKHIFileBinary.
 */
export function IsTextReferenceFromKHIFileBinary(
  refernce: TextReference,
): refernce is TextReferenceFromKHIFileBinary {
  return refernce.type === ReferenceType.KHIFileBinary;
}
